[1] Making a Listing Recommendation API Call ( 版) <http://developer.ebay.com/devzone/listing-recommendation/Concepts/MakingACall.html>
X-EBAY-GLOBAL-ID A valid Global ID value for an eBay site (such as "EBAY-US"). This value defaults to "EBAY-US" if this header is not included in the request. For a list of valid eBay Site IDs, see the Global ID Values page.